Question

which represents the inverse of the function f(x) = 4x?

Answer 1

Answer:

${ \tt{let \: inverse \: be \: m }} \\ m = \frac{1}{4x} \\ x = \frac{1}{4m} \\ { \bf{f {}^{ - 1} (x) = \frac{1}{4x} }}$

Answer 2

Answer: f(x)=1/4x

Step-by-step:
f(x)=4x
y=4x (replace f(x) with y)
x=4y (switch x and y)
1/4x=y (solve for y by dividing by 4)
y=1/4x
f^-1(x)=1/4x (put the solution back into the function)

hope this helps! :)